Description
| Design variant/feature | NNUB/W33 |
Dimensions
| d | 457.2 mm | Bore diameter |
|---|---|---|
| D | 660.4 mm | Outside diameter |
| B | 228.6 mm | Overall bearing width |
| C | 203.2 mm | Width outer ring |
| D1 | ≈ 599 mm | Shoulder diameter outer ring |
| F | 508 mm | Raceway diameter inner ring |
| b | 22.3 mm | Width of annular groove |
| K | 12 mm | Diameter lubrication hole |
| r1,2 | min. 6 mm | Chamfer dimension outer ring |
| r3,4 | min. 6 mm | Chamfer dimension inner ring |
| s | max. 15.6 mm | Permissible axial displacement from the normal position of one bearing ring relative to the other |
Abutment dimensions
| da | min. 483 mm | Abutment diameter spacer sleeve |
|---|---|---|
| da | max. 499 mm | Abutment diameter spacer sleeve |
| db | min. 513 mm | Abutment diameter shaft |
| Da | max. 634 mm | Abutment diameter spacer sleeve / housing |
| ra | max. 5 mm | Fillet radius |
| rb | max. 5 mm | Fillet radius |
Calculation data
| Basic dynamic load rating | C | 3 690 kN |
|---|---|---|
| Basic static load rating | C0 | 8 150 kN |
| Fatigue load limit | Pu | 640 kN |
| Reference speed | 670 r/min | |
| Limiting speed | 950 r/min | |
| Calculation factor | kr | 0.26 |
Tolerances and clearances
General bearing specifications
- Tolerances: Normal, P6, P5
- Radial internal clearance: cylindrical bore, tapered bore
Bearing interfaces
- Seat tolerances for standard conditions
- Tolerances and resultant fit
Double row cylindrical roller bearings are designed to accommodate high to very high radial loads in combination with medium to high speeds. The NR assortment includes many designs and variants, such as standard and full complement bearings and also greased and sealed bearings. Depending on the configuration of the outer and inner rings, the bearings are available in locating as well as non-locating designs.
- High to very high radial load carrying capacity
- Low friction
- Long service life
